JPS6012490B2 - Floor cutting machine for headrace tunnels, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deck cutting machine used for repairing eroded concrete decks of seven waterway tunnels and the like.

For example, the bed of a headrace tunnel at a hydroelectric power plant is eroded by water and sediment over a long period of use, causing the flow velocity to decrease, energy efficiency to deteriorate, and the strength of the tunnel to deteriorate. , is also extremely dangerous.

Therefore, in order to repair the slab, it is necessary to cut the eroded slab and then pour new concrete, but in the case of sub-buildings, all the cutting of the slab is done manually by workers, which reduces work efficiency. There were very few drawbacks. An object of the present invention is to provide a floor cutting machine capable of uniformly and efficiently cutting the floor of a headrace tunnel or the like. A pair of cutting drums for cutting the left and right sides of the floor plate are supported at the rear of the traveling truck so as to be movable left and right.

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 2, a traveling bogie 1' is provided with front wheels 3, 3 on each side of the vehicle body 2, and rear wheels 4, 4 on the left and right sides with the same wheel spacing as the front wheels. At the same time, one end of the arm 565 is connected to the left and right sides of the lower part of the vehicle body by shafts 6, 6 so as to be able to swing vertically,
a vertical displacement hydraulic cylinder 7 connected at one end to the vehicle body 2;
The rams 8, 8 of No. 7 are connected to the intermediate portions of the arms 5, 5, respectively, and the other ends of the two arms 5, 5 are provided with a cutting board for intermediate cutting of the floor plate, which is narrower in the middle of the left and right than the wheel spacing of the front and rear wheels. The drum 9 is rotatably supported with its axial center line being horizontal and perpendicular to the traveling carriage of the carriage 1.

On the other hand, at the rear end of the vehicle body 2, a guide plate 10 having a dovetail extending in the left-right direction is extended horizontally, and a pair of left and right movable plates 11, 11 having dovetail grooves are attached to the rear end of the guide plate 10. Hydraulic cylinders 18, 18 are oriented in the left-right direction and one end thereof is connected to the guide plate 101 as a driving means for moving the movable plates 11, 11 left and right as shown in the third diagram. At the same time, the rams 19, 19 are connected to the movable plate 1.
1 and 11, respectively, and these movable plates 11,
Arm 1 is attached to brackets 12, 12 protruding from the bottom surface of 11.
One ends of the arms 13, 13 are connected to the shafts 14, IW so as to be able to swing up and down, and rams 16, 16 of hydraulic cylinders 15, 15 for vertical displacement, one ends of which are connected to the movable plates 11, 11, are connected to the arms 13, 13. , and each pair of arms 13, 13, 13, of each movable plate 11, 11
Cutting drums 17, 17 for cutting the left and right sides of the floor plate are installed at the pond end of No. 13.
are rotatably supported, with the cutting drum 9 and the wheel's center line oriented parallel to each other. In this example, since the cross-sectional shape (intended cross-sectional shape) of the floor plate to be finally finished by the repair work is a gentle arc, the cutting drum 9 for cutting the intermediate section has an arc-shaped outer circumferential line that almost matches this. The cutting drums 17, 17 for cutting the left and right sides are formed in the shape of a truncated cone with an arcuate outer circumferential line that almost matches the intended cross-sectional shape of the floor plate. , cutting blades 20 such as cutter bits are provided protruding from the outer peripheral surface of these drums.

Among these cutting drums 9, 17, 17, if we look at the cutting drum 17, as shown in the fourth figure, the arms 13,
Bosses 2 at both ends of the drum are attached to short shafts 21, 21 protruding from 13.
2 and 22 are rotatably supported via bearings, and one of the short shafts 2 serves as a rotational drive means for the drum.
A hydraulic motor 24 is fixed in a cylindrical case 23 which is fitted at the tip of the drum 1, and a pinion 25 is fixed to the output shaft of the motor. A gear 27 is fixed concentrically with the drum 17, and the pinion 25 is meshed with the internal gear 27.

The other cutting drums 9, 17 also have substantially the same bush structure and rotational drive means as the above example. An example in which the action of this machine is used to cut the floor of a traveling bogie at a hydroelectric power plant will be explained next.

Hydraulic cylinder for vertical displacement? , 15, 15, with the cutting drums 9 and 17, 17 spaced apart from the ground, the cart 1 is transported into the headrace tunnel T to a working position with its front and back directions oriented in the longitudinal direction of the tunnel, and there, First, depending on the left and right sides of the floor plate F to be cut, the movable plates 11 and 11 are moved left and right along the guide plate turtle DI by driving the left and right moving hydraulic cylinder wings 8 and 18, and a pair of left and right side cutting drums are moved. 17, 17 to the maximum extent between the left and right sides of the floor plate to be cut. Next, each cutting drum 9, 17, 17 is rotated counterclockwise in FIG. , 17, 17 are gradually displaced downward to cut the floor plate F to a predetermined depth. Next, when the cart 1 is gradually moved forward (movement to the right in FIG. 1), as shown in FIG. Then, the right and left sides of the preceding cutting groove A are enlarged and cut using the left and right side cutting drums 7 and 17 to form the desired enlarged cutting groove B that extends almost all the way through the floor plate F. . In addition, during the above-mentioned preliminary cutting, the front and rear wheels 3, 3, 4, and 4 of the truck wings run on the floor plate F on the left and right outer sides of the cutting drum 9, and the normal running of the truck 1 is maintained. After cutting, new concrete is poured into the enlarged cutting groove B to complete the desired floor slab. According to the floor plate cutting machine for headrace tunnels, etc. of the present invention, the pair of cutting drums for cutting the left and right sides of the floor plate can be moved left and right as appropriate to correspond to different floor plates on the left and right sides of the floor plate. It is possible to adjust the cutting drum to be able to cut the entire center of the drum, and as a result, it is possible to perform the desired cutting on various types of different floor plates on the left and right sides in one run of the trolley, resulting in remarkable work efficiency. Improvements can be made.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a side view and FIG.
3 is a left side view of FIG. 1, FIG. 4 is an enlarged vertical sectional view of the cutting drum, and FIG. 5 is a schematic plan view showing the cutting action. DESCRIPTION OF SYMBOLS 1... Traveling trolley, 5, 13... Arm, 9... Cutting drum for cutting the middle part of the floor plate, 17... Cutting drum for cutting the left and right side parts next to the floor, 24... Hydraulic motor, 25... Pinion, 27.・
・Internal gear. Key - Diagram Key 2 Crab Figure 4 Figure 3 Foothill 5 Garden

Claims (1)

[Scope of Claims] 1. A cutting drum for cutting the middle part of the floor plate, which has cutting blades protruding from its circumferential surface, is placed on the front part of the traveling truck, with the axis of the drum being horizontal and orthogonal to the running direction of the traveling truck. A pair of cutting drums for cutting the left and right sides of the floor plate, each having cutting blades protruding from the circumferential surface, are mounted at the rear of the traveling carriage in a rotatable and upwardly displaceable state. A water conduit tunnel, etc., which supports a cutting drum for cutting the middle part of the disk and a shaft center line parallel to each other so as to be rotatable and movable up and down, and is also movable left and right, and is equipped with a driving means for rotating each of the above-mentioned cutting drums. Floor cutting machine. 2. Each of the cutting drums is pivotally supported by an arm that is vertically swingably mounted on the traveling carriage, and each of the cutting drum rotation drive means includes a motor that is fixed to the arm and a motor that is mounted on the inside of the cutting drum. The floor plate cutting machine according to claim 1, comprising a fixed internal gear and a gear fixed to the output shaft of the drive motor and meshing with the internal gear.